BMW L6 M6 1987 Electrical Troubleshooting Manual

This comprehensive Electrical Troubleshooting Manual provides detailed guidance for diagnosing and repairing electrical faults in the 1987 BMW L6 M6 model.

Key Features and Benefits:

  • Step-by-step troubleshooting procedures guide you through the diagnostic process, identifying potential causes and solutions.
  • Detailed electrical schematics and diagrams visually represent the electrical systems, aiding in component identification and circuit tracing.
  • Important specifications and measurements ensure accurate and efficient repairs.
  • Tailored specifically for the 1987 BMW L6 M6, catering to its unique electrical system configuration.
  • Empowers users to perform electrical repairs themselves, saving time and money while gaining a deeper understanding of their vehicle.

Technical Specifications and Details:

Electrical System:

  • 12-volt negative ground system
  • Battery capacity: 80 Ah
  • Alternator output: 100 amps

Major Electrical Components:

  • Engine control module (ECM)
  • Ignition coil
  • Starter motor
  • Voltage regulator
  • Headlight switch
  • Turn signal switch
  • Wiper switch

Maintenance and Repair Information:

Battery Replacement:

  • Recommended battery: BMW-approved 12-volt battery with 80 Ah capacity
  • Battery location: Under the hood, on the passenger side

Fuse and Relay Replacement:

  • Fuse and relay panel locations:
    • Under the hood, next to the battery
    • Inside the cabin, under the dashboard
  • Fuse and relay identification: Refer to the electrical troubleshooting manual for specific locations and ratings

Electrical Troubleshooting:

  • Use a multimeter to measure voltage, current, and resistance
  • Inspect wiring harness for damage or loose connections
  • Consult the electrical troubleshooting manual for circuit testing procedures

Common Electrical Problems and Solutions:

Battery Drain:

  • Symptoms: Difficulty starting the vehicle, dim headlights
  • Solution: Check for parasitic drains using a multimeter, inspect battery terminals for corrosion

Electrical Shorts:

  • Symptoms: Blown fuses, intermittent electrical failures
  • Solution: Inspect wiring harness for damage, repair or replace damaged wires

Ground Faults:

  • Symptoms: Electrical components not functioning properly
  • Solution: Check ground connections for tightness and corrosion, clean or repair as needed

This comprehensive BMW L6 M6 1987 Electrical Troubleshooting Manual is an indispensable resource for owners and technicians alike. Its detailed troubleshooting procedures, electrical schematics, and technical specifications empower you to diagnose and repair electrical faults with confidence and precision. and precision.

*1987 Vehicles Built Before 9/86 Use 1986 635CSi Electrical Troubleshooting Manual For Diagnostics


  • How to use this manual
  • Symbols
  • Systematic Troubleshooting
  • Power Distribution
  • Charging System
  • Start
  • Injection Electronics 3.5 Engine
  • Injection Electronics S38 Engine
  • Electronic Transmission Control
  • Brake Lining Warning
  • Antilock Braking System (ABS)
  • Self- Leveling Suspension
  • Power Mirrors
  • Central Locking
  • Power Windows
  • Power Seats
  • Sunroof
  • Sunroof
  • Body Electrical
  • Ignition Key Warning/Seatbelt Warning
  • Wiper/Washer
  • Instrument Cluster
  • Active Check Control
  • Light Switch Details
  • Headlights/ Fog Lights
  • Turn/ Hazard Lights
  • Park/ Tail/ Underhood Lights
  • Rear Marker/ License/ Trunk Lights
  • Back Up Lights
  • Stop Lights
  • Interior Lights
  • A/C Panel Lights
  • A/C Temperature Control
  • A/C Blower Controls
  • A/C Blower Controls
  • Rear A/C Evaporator
  • Heating and Air Conditioning
  • Auxiliary Fan
  • Radio/ Power Antenna
  • Cruise Control
  • On- Board Computer
  • Component Location Views
  • Splice Location Views
  • Connector Views
  • Component Location Chart

Language: English
Format: PDF
Pages: 188

BMW L6 M6 1987 Electrical Troubleshooting Manual